Vas week 2 : carotid duplex knowledge check

what is most common area for atherosclerosis in the extracranial arteries

proximal ICA (because of the bulb)

Occlusion of the ______ may result in loss of end diastolic flow in the CCA

ICA

homogenous plaque is best described as having

uniform echo pattern

to calculate the ICA/CCA ratio, the following measurements are used

Highest PSV from pre-bulb distal CCA and proximal ICA

Pt is status post carotid enterectomy two days ago. Why is it possible that we may encounter acoustic shadowing in area where patch is used?

Air entrapment

what is the most common mechanism for carotid artery stenosis?

atherosclerosis

doppler waveforms normal demonstrate ____ resistance in the ICA

Low

the peak systolic velocities should be relatively consistent throughout the carotid artery’s

true

vertebral artery stenosis usually occurs

proximal segment

posterior cerebrovascular circulation disorders are primarily caused by disease in which arteries

vertebral

The ICA positioned

posterolateral

identify normal velocities in the internal carotid

<125 cm/sec (book has 180cm/s)

with carotid stenting, where will restenosis likely occur?

Prox and distal stent edges

which vessel typically responds to the temporal tap? why?

The ECA because we are tapping the superficial temporal (STA) and its connected to the ECA so it will respond to the temporal tap.

typically the ECA luminal diameter is larger than the ICA

False

All of the following are possible abnormal findings in a patient recently status post carotid endarterectomy except:

Restenosis secondary to atherosclerosis

What is a suspected mechanism for internal carotid artery stenosis in younger female patients?

Fibromuscular dysplasia (FMD)